Most form elements share a set of common properties, such as a Name, Caption, and a Defaultvalue. You’ll see these common properties on most (but not all) form elements. In addition to the common properties, each individual form element has its own unique properties.
When selecting multiple elements, any changes you make to the properties that are common to those elements will immediately apply to all of them. When the elements in the selection each have different values for a common property, the value will indicate <mixed>.
Note: Some properties are not common, and will be unavailable when you select multiple elements. These properties will not be shown in the property panel. This will often be the case even for elements that might appear to be quite similar.
You can readily change the values of many common properties. For example, it takes just a few steps to change the Caption value for several fields:
Create a form that has a three Text Fields. You might give them captions like Last Name, Address, and Phone.
Hold down the CTRL key and, in the Form Outline Panel, click all three of those text fields.
Now, look for the Encrypted property in the Element Properties Panel, and then change the Value for that property to true (select that cell in the Value column and select true).